热重法研究煤粉催化燃烧的特性

he effects of several kinds of rare earth metal compounds and alkaline-earth metal compounds on combustion property of coal have been investigated using synthetical thermal analyzer, especially the influences of contents and particle sizes of CeCO3 on the combustion process of coal. The results show that the rare earth metal compounds can increase the combustibility of volatile in the coal、decrease its ignition point and shorten the whole combustion time. The temperature of coal ignition can be reduced about 30℃ when the addition content of the rare earth metal compounds was 1.0 %. The catalytic effect becomes more eminent at the condition of either the addition content of catalyst increase or the particle size decrease. In addition, the mechanism of combustion-supporting is preliminarily discussed in this paper.